Light point power keyframes not showing up in graph editor
In my particular case I could not see the points in the graph editor because the power of my light was 2000 W and it was way beyond the default view range.
As suggested by AtomicBezierSlinger you could perform a Select All (A) and then View Selected (Numpad .(the period key)):


Alternatively, you could also View All (Home). This is convenient if a numerical keypad is not available.